(+)-Validoxylamine A 通过选择性脱氧合成 (+)-validoxylamine B 衍生物,该衍生物由部分保护的 (+)-valienamine 与 (1R,2S,5R,7R,8R,9R,10R) 偶联获得)-8,9-二苄氧基-5-苯基-4,6,11-三氧杂三环[8.1.0.02,7]十一烷。本合成构成了抗生素有效霉素 A 的正式全合成。
报告了有效霉素B(1a)和有效羟胺B(2a)的第一个完整合成;(+)-valienamine的环氧化物(12)与部分受保护的衍生物(16)偶联,然后脱保护,得到(1a),从其全部O-乙酰化衍生物(1b)的1 H nmr光谱中鉴定。或者,将环氧化物(24)与胺(16)偶合,得到化合物(25),其结构可通过将(25)转化为有效氧胺B壬酸-O-乙酸酯(2b)。将衍生自(25)的经过适当保护的胺(29)糖基化,然后脱保护和乙酰化,得到(1b)。
Synthesis of carbasugar-containing non-glycosidically linked pseudodisaccharides and higher pseudooligosaccharides
作者:Ian Cumpstey
DOI:10.1016/j.carres.2009.09.008
日期:2009.11
This minireview covers synthetic methods towards carbasugar-containing non-glycosidicallylinked pseudodisaccharides or higher pseudooligosaccharides. Carbocyclic pyranose mimetics (saturated or unsaturated between C-5 and C-5a) are linked by ether, thioether or amine bridges to carbohydrates or other carbasugars.
The first complete synthesis of the antibiotic validamycin B as its dodeca-O-acetate is reported; coupling of the epoxide (6) and the partially protected valienamine derivative (14), followed by deprotection, gives the product (1b) which was identified by 1H n.m.r. spectroscopy.
据报道,抗生素有效霉素B是十二烷基-O-乙酸酯的第一个完整合成。环氧化物(6)和部分受保护的缬胺胺衍生物(14)的偶联,然后脱保护,得到产物(1b),该产物通过1 H nmr光谱法鉴定。
MIYAMOTO, YASUNOBU;OGAWA, SEIICHIRO, J. CHEM. SOC. PERKIN TRANS. PT 1,(1989) N, C. 1013-1018
作者:MIYAMOTO, YASUNOBU、OGAWA, SEIICHIRO
DOI:——
日期:——
OGAWA, SEIICHIRO;MIYAMOTO, YASUNOBU, CHEM. LETT.,(1988) N 5, 889-890
作者:OGAWA, SEIICHIRO、MIYAMOTO, YASUNOBU
DOI:——
日期:——
OGAWA, SEIICHIRO;MIYAMOTO, YASUNOBU;NOSE, TAISUKE, J. CHEM. SOC. PERKIN TRANS. PT I,(1988) N 9, C. 2675-2680